thompson



lUNITED *STATES `PATENT OFFICE.

WILLIAM S. THOMPSON, OF ROCHESTER, NEW YORK.

LAMP.

Specification of Letters Patent No. 34,080, dated January 7, 1862.

To all whom it may concern:

Be it known that I, WM. S. THoMPsoN, of the city of Rochester, county of Monroe, and State of New York, have made and invented certain new and useful Improvements in Lamps for Burning Kerosene or Coal-oil and other Hydrocarbons; and I do h ereby declare the following to be a full and accurate description of the same, reference being had to the accompanying drawings, making part of the specification, and to the letters of reference marked thereon, same letters referring to like parts in all the figures.

Of said drawings Figure l is an elevation of my improved lamp. Fig. 2 is a section of the same, and Fig. 3 is a detail as subsequently described.

The nature of this invention consists in certain improved arrangements and combinations of parts whereby greater security, convenience, and efficiency are obtained in that form of lamp which is designed to burn the aforesaid kerosene oils without a chimney and for which a patent has been ordered to issue to Daniel Hughes, of Rochester, N. Y.

To enable others to make and use my invention I will describe its construction and mode of operation.

In the drawing Fig. 2 it will be observed that attached to the burner B is the cap C which is supported by four radial arms as seen in Fig. 3. This cap being firmly attached to the burner is removed from the lamp and applied thereto by a single operation-thus greatly increasing the convenience of the instrument. But inaddition to this convenience I also secure two important additional advantages. In the first place owing to the cap C being permanently attached to the burner there is no necessity for having any slot in the side of the cap to permit the passage of the milled head by which the wick is raised or depressed as is absolutely unavoidable where the cap C is removable from the burner by thus obviating the necessity for this opening in the side of the cap the draft is greatly improved and the flame rendered much steadier. The second advantage consists in the fact that where the cap is removable the ratchet wheels which propel the wick must be placed much lower down than is advisable-this being necessary in order to allow of the removal and application of the cap. By being placed thus low and the wick being consequently driven forward a fargo, the wick is apt to wrinkle and stick in the burner or holder, while by the arrangement which I have just described the ratchet wheels may be placed at any convenient height or the wick be thus drawn instead of pushed.

In order to increase the security and efficiency of the lamp I have applied a semicylindrical cover to the ratchet wheels aZ- the ends of said cover being closed and the whole firmly soldered to the burner. This prevents the passage of any vapor from the wick into the air which is ascending to the flame and thus obviates any danger of eX- plosion if a poor article of oil should happen to be in use.

As it is necessary to take hold of the cap O in order to remove the burner, and as this cap becomes inconveniently hot during the time the lamp is in use, I avoid the necessity of waiting until it gets cold by applying to the base of said cap the ring R of porcelain or other badly conducting ma terial which thus allows us readily to take hold of the cap and unscrew the burner for purposes of filling &c. The lamp arranged in this manner is as readily trimmed as in the old form where the cap is removable, as the wick can be turned up quite above the cap and then cut parallel to the burner.

I-Iaving thus described my invention I claim 1. The means, substantially as described, of preventing the escape of the vapor from the wick through the opening left for the ratchet wheels, whereby all danger of eX- plosion is obviated.

2. In combination with the means recited in the first claim I claim the arrangement herein described of the cap (C), burner (B) and ratchet wheel (d).

WILLIAM S. THOMPSON.

lVitnesses:

N. E. PAINE, JOHN PLEIN. 

